Tube Amplifier Repair

Tube Amplifier Repair Jay Forbes has been repairing tube amplifiers for over 40 years. This page documents repairs made. To inquire about getting your amplifier repaired, please send an email to:

[email protected]

or visit www.jfradiorepair.com

Include make, model and condition (e.g.

tubes missing, rust), I will respond with a rough estimate to repair. I look forward in discussing your repair issues and/or bringing your amplifier back to factory operating condition.

Operating as usual

Photos from Tube Amplifier Repair's post
08/10/2021

Photos from Tube Amplifier Repair's post

Photos from Tube Amplifier Repair's post
08/10/2021

Photos from Tube Amplifier Repair's post

Photos from Tube Amplifier Repair's post
04/25/2021

Photos from Tube Amplifier Repair's post

Photos from Tube Amplifier Repair's post
03/13/2021

Photos from Tube Amplifier Repair's post

Photos from Tube Amplifier Repair's post
03/13/2021

Photos from Tube Amplifier Repair's post

Fisher 400c - New on/off installed
12/17/2020

Fisher 400c - New on/off installed

Heathkit W-5M  #2 Repair
10/02/2020

Heathkit W-5M #2 Repair

Heathkit W-5M  #1 Repair
10/01/2020

Heathkit W-5M #1 Repair

Photos from Tube Amplifier Repair's post
09/08/2020

Photos from Tube Amplifier Repair's post

Photos from Tube Amplifier Repair's post
09/07/2020

Photos from Tube Amplifier Repair's post

Marshall 4140 Repair
01/16/2020

Marshall 4140 Repair

Marshall 4140 Repair

French Tube Amp Repair
12/14/2019

French Tube Amp Repair

French Tube Amp Repair

Fisher X-100a Repair
04/18/2019

Fisher X-100a Repair

Fisher X-100a Repair

Fisher X-100 Repair
12/08/2018

Fisher X-100 Repair

Fisher X-100 Repair

Fisher X202-b Repair
11/12/2018

Fisher X202-b Repair

Fisher X202-b Repair

Shengle Tube Amp Repair
10/31/2018

Shengle Tube Amp Repair

Shengle Tube Amp Repair

Bogen DB-10 Repair
10/04/2018

Bogen DB-10 Repair

Bogen DB-10 Repair

Zenith Phono Repair
10/04/2018

Zenith Phono Repair

Zenith Phono Repair

McIntosh MC225 Repair
10/02/2018

McIntosh MC225 Repair

McIntosh MC225 Repair

McIntosh MC225 Repair
09/24/2018

McIntosh MC225 Repair

McIntosh MC225 Repair

Telefunken Amp Repair
07/25/2018

Telefunken Amp Repair

Telefunken Amp Repair

Fender 5E3 Repair
07/25/2018

Fender 5E3 Repair

Fender 5E3 Repair

Fender 5E3 Repair
07/10/2018

Fender 5E3 Repair

Fender 5E3 Repair

Fisher X-100B Repair
06/29/2018

Fisher X-100B Repair

Fisher X-100B Repair

Fisher 500c - LED Light Install
03/29/2018

Fisher 500c - LED Light Install

Fisher 500c - LED Light Install

Fisher 500c Repair
03/29/2018

Fisher 500c Repair

Fisher 500c Repair

Tube Amplifier Repair Service and Forum's cover photo
01/26/2018

Tube Amplifier Repair Service and Forum's cover photo

EICO 2080 Amp Repair
01/23/2018

EICO 2080 Amp Repair

EICO 2080 Amp Repair

Fisher CA-880 -- Servicing
01/05/2018

Fisher CA-880 -- Servicing

Fisher CA-880 -- Servicing

01/05/2018
Fisher Amp - Noise Spike at Power Up

Why is meter Spiking at Power Up?
Is this Normal for a SS Amp?
If Normal, what circuit has failed to prevent this spike?
I'll post answer below after a few have responded.

Westinghouse Stereo Console
12/09/2017

Westinghouse Stereo Console

Realistic SAF-40D Repair
12/09/2017

Realistic SAF-40D Repair

Realistic SAF-40D Repair

Address

20365 Belmont Park Terrace, Unit 114
Ashburn, VA
20147

Opening Hours

Monday 10am - 6pm
Sunday 10am - 6pm

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Comments

I have a problem with reverb on my Marshall JTM30 . When I turn on the amp sometimes reverb is not working. After a few times pressing on-off standby switch reverb start working normaly. Any idea? Tnx
I built a Princeton 5F2 clone. Simple circuit, having built several amps of complexity. No shorts (shown by my current limiter bulb), but on power up, the amp squeals, like an oscillation. I remove the preamp tube (only one) and apply power, no squeal, and the filters charge. Looks normal. have swapped out all three tubes and several capacitors. Bad filter?
Hi, I have a red k**b Fender Super 60 head from the 90's and a tremendous amount of hum is introduced as I increase the 'Reverb' control... anybody else have this issue?
Need help troubleshooting/repair 1966 Fender Dual Showman amp
Looking for a Schematic for Rickenbacker M-88, any help appreciated! Thank you!
Does anyone know where i can get the wiring schematic for a Route 101 tube 60 guitar amp? or I just really need the value of resistor # R39 thanks